Co-occurrence Maps

Author: ANONYMOUS 7/22/2024

Supplementary Analysis: Co-occurrence Maps of Keyword and Abstract Corpora

In the main manuscript, we provided a selection of co-occurrence maps (i.e., a general map of the keyword corpus and a general map of the abstract corpus). We further presented maps for specific ideologies (i.e., “Islamist,” “far right,” and “far left”) derived from the abstract corpus only.
In this supplementary material, we present all specific co-occurrence maps (i.e., “Islamist,” “far right,” “far left,” “lone actor,” “foreign fighter,” and “male supremacist”) generated from both the keyword corpus and the abstract corpus.
Recognizing the importance of the adolescent age group in the context of radicalization, we further provide detailed co-occurrence maps for the term “adolescence” to shed light on the key concepts and associations related to this key demographic.

1. Islamist

1.1 Analysis 1: Keywords

Figure 1.1: Co-occurrence map for “islamist” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

1.2 Analysis 2: Abstracts

Figure 1.2: Co-occurrence map for “islamist” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

2. Far right

2.1 Analysis 1: Keywords

Figure 2.1: Co-occurrence map for “far right” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

2.2 Analysis 2: Abstracts

Figure 2.2: Co-occurrence map for “far right” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

3. Far left

3.1 Analysis 1: Keywords

Figure 3.1: Co-occurrence map for “far left” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

3.2 Analysis 2: Abstracts

Figure 3.2: Co-occurrence map for “far left” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

4. Lone actor

4.1 Analysis 1: Keywords

Figure 4.1: Co-occurrence map for “lone actor” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

4.2 Analysis 2: Abstracts

Figure 4.2: Co-occurrence map for “lone actor” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

5. Foreign Fighter

5.1 Analysis 1: Keywords

Figure 5.1: Co-occurrence map for “foreign fighter” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

5.2 Analysis 2: Abstracts

Figure 5.2: Co-occurrence map for “foreign fighter” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

6. Male Supremacist

6.1 Analysis 1: Keywords

Figure 6.1: Co-occurrence map for “male supremacist” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

6.2 Analysis 2: Abstracts

Figure 6.2: Co-occurrence map for “male supremacist” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

7. Adolescence

7.1 Analysis 1: Keywords

Figure 7.1: Co-occurrence map for “adolescence” in Analysis 1. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.

7.2 Analysis 2: Abstracts

Figure 7.2: Co-occurrence map for “adolescence” in Analysis 2. Edges represent the term co-occurrence frequency, with thickness proportional to frequency. Hollow shapes represent terms featured in prominent theory.